Informatics Publishing Limited

Riddhi Tiwari ¹, S. P. Dange ¹, Arun Khalikar ¹, Smita Khalikar ¹, Sagar Chaudhari ¹

Affiliations
1 Department of Prosthodontics, Govt. Dental College and Hospital, Aurangabad, Maharashtra, IN

Abstract

Acquired defects of hard and soft palate may be due to trauma, pathological changes, radiation burns or surgical intervention. Rehabilitation of a maxillectomy defect by an obturator not only closes the opening of oral cavity into the nasal and antral cavities but also prevents reflux of food and fluids, enables mastication and swallowing and improves patient’s speech and self confidence. This article describes a case report for one such partial maxillectomy defect restored with an obturator prosthesis.

Keywords

Partial Maxillectomy, Adenoid Cystic Carcinoma, Obturator.

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S. P. Dange ¹, O. P. Chimankar ², S. K. Bodele ²

Affiliations
1 Department of Physics, Sindhu Mahavidyalaya, Nagpur-440017, (Maharashtra), IN
2 Department of Physics, RTM Nagpur University, Nagpur-440033, (Maharashtra), IN

Abstract

Ultrasonic velocity (u), density (ρ) and viscosity (η) have been measured at 2 MHz frequency in the binary mixtures of ascorbic acid with methanol over the entire range of concentration at room temperature. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β_a), acoustic impedance (Z), free length (L_f), free volume (V_f) and internal Pressure (P_i). In a given bio-solution, the formation of the intermolecular H-bonds leads to enhanced dipole-dipole interactions. The above said parameters were plotted against the concentration of ascorbic acid with methanol over the entire composition range, indicates that the strong hydrogen bonding interaction between the molecules of the mixture. The ultrasonic studies support the elusion of the ascorbic acid peak using the mobile phase with methanol.

Keywords

Ultrasonic Velocity, Binary Mixture, Hydrogen Bonding, Intermolecular Interaction.

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